Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ecbe3c20a80096…

MALICIOUS

PDF

96.0 KB Created: 2021-08-11 10:41:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ccb332a578f1dccede690ca03e74bd8b SHA-1: 1799f4afe32b4f699e8203b277c8a5b478d784e6 SHA-256: 75ecbe3c20a800963810002b9c19694b6aae6ddf90d86ea4ea9ad11757f2e6e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of numerous distinct hosts and the use of 'utm_term' parameters indicate a coordinated effort to drive traffic to potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/p196uoctski8ikbn455tqslptl/82908895082.pdf In PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/552a33b45de0df066461b42accbbbd61/pujusigatexivosasovagipe.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160c5965ae70ba---nuxakoduj.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/navepikigonelatokufogo.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/d39c62cdc27af99e37073517785bed8d/99358656594.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/daae08996c59d95ee5c4ef08af54e3a8/9351315213.pdfIn PDF document text
    • http://cuacuonnhanh.vn/Images_upload/files/52537637107.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/disisubalupedenexi.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/972b0101acbe539c700fb2c8ba70b92e/tikezolikumiz.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16072194b9809a---97939724679.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68340e5c22---lutinewiki.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/5ee5814394ccfb5a168e50dafd756147/vilelumeb.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607d160e6de87---35021378494.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609077124dc93---lagajibogesurewudunadit.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/d48726a48d9dae41477e16e482c519e2/wuzob.pdfIn PDF document text
    • http://transchem-tech.com/Uploadfiles/files/gosab.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160edc321cd82d---17450906825.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/5503057380.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a43954ca4d8---19135773850.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/3r0tdia9o1a1bl4dm8elfhvnee/zazafujarak.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210629013117.pdfIn PDF document text
    • https://rajatotogroup3.com/contents//files/63222641139.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ketowagonekivek.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff20984138---rexewezineru.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/mijexazisobabomogep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=dosis+pediatricas+de+medicamentos+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D1 16372 bytes
SHA-256: 9e33fbdffefd4f83188e682a137182545928569734ab6aa5ddc29fe9fb14bf7b
font_01_sfnt_off0001102e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102E 17932 bytes
SHA-256: 01ff05cea416494d773b3b5fd73696d16d400bf7adda39136c4f6bea3d66f5b3
font_02_sfnt_off00013e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15661 10736 bytes
SHA-256: cf946435720ababb3f740949ae38b48ea5b51d2c9561e94e247ea1bbde9a2d10

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